Air filter



Amai s, 1924; 1,489,831

A. JORDAHL AIR FILTER Filed Feb. lO 1923 Q Patented Apr. d, i924..

PATENT @FFME NETE@ STTS ANDERS JOBDAHL, F NEW YORK, N. Y.

AIR FILTER.

` Application led February 10, 1923. Serial No. 618,204.

To all whom t may concern:

Be it known that I, ANDERS JORDAHL, a subject of the King of Norway, residing at N ew York, in the county and State of New York, have invented certain new and useful Improvements in Air Filters, of which the following is a specification.

rlhis invention relates to filters adapted to remove dust, grit, and other foreign substances from the air supplied to thesensitive parts of machinery, and although adaptedl for devices of'various kinds is specially designed for use in connection with tractors, trucks, and automobiles.

ln respect of structure it relates to an air filter having means-providing for an upward passage of the unfiltered air, and a reverse .downward passage of the 'airafter being tiltered. The invention has for one of its objects to produce a device of the character stated, simple in construction, eective in operation for the purpose intended,` durable in use, and adapted to be readily applied and operated in connection with tractors, motors, and

automobiles.

A further object of the invention :is to provide an air filtering device having suitable filtering elements and so constructed ac that the unfiltered air may be received and the filtered air discharged through the lower portion of the device.

@ther objects lare hereinafter more particularly stated in connection with the sev- 85 eral parts comprising the invention.

rlhe accompanying drawings show the'preferred form of my invention, but it is to be understood that various changes and alternate constructions may be employed in lieu e0 of that herein shown and described without departing from my invention.

ln the accompanying drawings, in which similar reference numerals indicate corresponding parts throughout the several views: Fig. 1 illustrates an air filter embodying my invention in front elevation, partly broken away;

Fig. 2 represents a vertical longitudinal section taken on the,.line 2-2 looking in the no vdirection ot the arrow, the container for the ltering material. being shown partly in side elevation and partly in section;

Fig. 3 is a horizontal section taken on the line 3 3 ot Fig. l;

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Fig. 4 is a plan of the container for the iltering elements detached from the casing; an

Fig. 5 is a transverse section of a modification of the invention.

The filter is provided with an outer casing which may be of any suitable construction, but preferably having; an inclined upper wall l for the purpose of deiecting the air laterally after passing upward out of the filtering bed. rThe casing may, if desired, be provided with a supporting base, or it may be supported by-Ineans of angular side, brackets 2 and attached thereby to any suitable means of support.

The interior of the casing is provided with a container for holding the filtering material, preferablyv extending the fulldepth of the casing and the greater part of the width thereof. i

The container may be of any suitable construction adapted to perform the functions of that herein shown and described, but is preferably formed of side walls 3 and up er and lower screen-like sections 1l, prefere ly provided with a marginal plate 5. The lateral margins of the iltering containers may be supported in the casing in any suitable manner, such as by means of brackets or ways 6 adapted to enable the container to slide inward and outward on said ways.

rThe casing is provided with -an auxiliary wall 7, preferably inclined, entending the length of the casing so as to form with the bottom of the container and one wall of the casing an inlet or receiving chamber for the unfiltered-air, and the outer margin of said wall is preferably inclined slightly upward to aid in deiiecting theincoming uniltered air to some extent. The bottom of the casing between the lower margin of the wall 7 and one of the side walls of the casing is formed with an opening 8 providing a comparatively maximum area at the under ortion of the filtering bed for the uniiltere air to pass into.

The interior of the casing above the filtering bed and at one side of said bed forms ay discharge chamber having at the bottom thereof an outlet connection 9, of any suitable construction, adapted to be coupled with a pipe or conduit leading to the device for which the filtered air is to be supplied.

The filtering container may be inserted 1n or removed from the casingby means of a face plate 10 secured to the container and provided with a handle bar 12.-.

The filtering material may be of any suitable construction or formation, but for most purposes I prefer to use small cylindrical elements coated with a viscous material adapted to hold dust, grit, and other foreign mater removed from the air passing through the filter bed. The container for the filtering bed is specially adapted to be removed from the casing to enable the material forming the bed to be cleansed and replaced in position whenever occasion therefor may arise.

When the device is in operation the unfiltered air' enters the casing ,through the .aperture or opening 8 in the bottom thereof and passes upward through the filter bed and into the upper discharge chamber where it is' somewhat deflected by the inclined top thereof toward onevside of the casing, and then passes downward and outward through the discharge coupling 9, which in some instances may be connected with an A exhaust device, drawing the filtered air from the upper portion of the casing and side thereof downward,

In the construction herein shown and described, the receiving chamber is preferably formed by means of the inclined wall 7, the walls of the casing, and the bottom of the filtering container. It is to be understood, however, that such construction, and i.

the construction of the discharge 4chamber may be modified without departing from the invention. In some instances the receiving chamber may be dispensed with, as shown in Fig. 5, wherein a casing 13 is' provided with a filtering member 14 of the class herein described, preferably inclined relative to the casing, which may receive the filtered air directly and discharge it into thechamber 15, from which the filtered air passes outl ofthe discharge 16.

The filtering member 14 may be removably secured to the casing in any suitable manner, such as by means of the flange-17 and bolt connection 18, and the flange 19 and stud 20,

What- I claim as new and desire to secure by Letters Patent in:

1. An air filter comprising an outer casing having an inlet opening and an outlet opening in the lower portion thereof, a container for filtering material mounted'within said casing and having the area of the bottom thereof larger than the inlet opening of said casing, and an auxiliary wall extending from the bottom of said container to the bottom of said casing between said openings, forming with said container and one of the walls of said casing an inlet chamber below said container, and an outiasasei let chamber above and at the side of said container. i

2. An air filter, comprising an outer casing having an inlet opening and an outlet opening extending through the lower portion of the casing and an opening in one of the walls thereof, a container for filtering material slidingly mounted within the casin through said opening with one of its si es in contact with one of the walls of said casing, and its opposite sideand the top and bottom of said container spaced from the walls of' said casing opposite thereto,

.and an auxiliary wall extending from the spaced side of said container to the bottom of said casing between said openings, forming an inlet chamber beneath said container communicating with said inlet opening, and a discharge chamber extending above and along one side of said container communicating with said outlet opening.

3. An air filter, comprising an outer casing having oppositely disposed walls of unequal height and an inclined top connecting said Walls, and provided also with an inlet opening and an outlet opening through said casing at the lower portion thereof, a container for filtering material mounted within said casing having the area of the bottom thereof larger than the inlet of said casing, and an auxiliary wall extending from the bottom of said container at one end thereof to the bottom of said casing between said openings, forming with said container and one of the walls of said casing an inletV chamber below said container and an outlet chamber above and at the side of said container communicating with the outlet opening of said casing.

4. An air filter, comprising an outer casing having oppositely disposed walls and an inlet opening and outlet opening formed in the lower portion thercof, a container for filtering material slidingly mounted within said casing and having the area. of the bottom thereof larger than the inlet` opening of said casing, and having the area of the top thereof smaller than the transverse area of said casing in the plane of said top, one wall of said container being secured to one wall of said casing and the opposite wall of said container being spaced from the opposite wall of said casing, and a wall connected with and supporting said opposite end of saidcontainer and extending downward to the bottom of said casing between theinlet and outlet openings'therof, and having its free edge inclined upward and over the inlet opening of said casing.

In testimony that Iclaim the foregng asmy invention, I have signed my name hereunder.

ANDERS J ORDAHL. 

